fixed codeclimate errors (partically)

lib/tasks/contacts/archive.rake

@@ -26,7 +26,7 @@ namespace :contacts do
   end
 
   def log(msg)
-    @log ||= Logger.new(STDOUT)
+    @log ||= Logger.new($stdout)
     @log.info(msg)
   end
 end

lib/tasks/dev/create_bank_transactions/create_bank_transactions.rake

@@ -26,7 +26,7 @@ namespace :dev do
     http.ca_file = ENV['lhv_ca_file']
 
     http.start do
-      response = http.post(api_base_uri.path + '/payment', request_body, request_headers)
+      response = http.post("#{api_base_uri.path}/payment", request_body, request_headers)
 
       if response.is_a?(Net::HTTPSuccess)
         puts 'Success'

lib/tasks/invoices/cancel_overdue.rake

@@ -10,4 +10,4 @@ namespace :invoices do
 
     puts "Cancelled total: #{cancelled_invoice_count}"
   end
-end
+end

lib/tasks/invoices/process_payments.rake

@@ -41,7 +41,7 @@ namespace :invoices do
   end
 
   def log(msg)
-    @log ||= Logger.new(STDOUT)
+    @log ||= Logger.new($stdout)
     @log.info(msg)
   end